My impression is that all electronics contain components from Shenzhen. Like, everyone I know who did a hardware startup moved to Shenzhen and spent at least si

My impression is that all electronics contain components from Shenzhen. Like, everyone I know who did a hardware startup moved to Shenzhen and spent at least six months there (if they didn't move part of the team there permanently). So you should (dis)trust all consumer-facing manufacturers equally, and find another way to verify that your system is running correctly. For example, here's how Chromium OS / Chrome OS does it: https://www.chromium.org/chromium-os/chromiumos-design-docs/firmware-boot-and-recovery https://www.chromium.org/chromium-os/chromiumos-design-docs/... https://www.chromium.org/chromium-os/chromiumos-design-docs/verified-boot https://www.chromium.org/chromium-os/chromiumos-design-docs/...